com.smartgwt.client.widgets.grid.events

## Interface GroupTreeChangedHandler

- All Superinterfaces:
    com.google.gwt.event.shared.EventHandler

      public interface GroupTreeChangedHandler
      extends com.google.gwt.event.shared.EventHandler

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `onGroupTreeChanged(GroupTreeChangedEvent event)` Callback fired when a `grouping` operation completes, whether it started as a direct call to `groupBy()` or `regroup()` or data changing, including incremental changes.

- - ### Method Detail

    - #### onGroupTreeChanged

          void onGroupTreeChanged(GroupTreeChangedEvent event)

      Callback fired when a `grouping` operation completes, whether it started as a direct call to `groupBy()` or `regroup()` or data changing, including incremental changes.

      If `changeType` is "groupBy", `ListGrid.groupBy()` should have been called at the beginning of the operation, and `ListGrid.groupByComplete()` will be called immediately before this method. If `changeType` is "regroup", then `ListGrid.regroup()` should have been called at the beginning of the operation.

      Parameters:
        `event` - the event